<?php

/*
 * This file is part of SwiftMailer.
 * (c) 2004-2009 Chris Corbyn
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * An Authentication mechanism.
 *
 * @package    Swift
 * @subpackage Transport
 * @author     Chris Corbyn
 */
interface Swift_Transport_Esmtp_Authenticator
{
	/**
	 * Get the name of the AUTH mechanism this Authenticator handles.
	 *
	 * @return string
	 */
	public function getAuthKeyword();

	/**
	 * Try to authenticate the user with $username and $password.
	 *
	 * @param Swift_Transport_SmtpAgent $agent
	 * @param string $username
	 * @param string $password
	 *
	 * @return boolean
	 */
	public function authenticate(Swift_Transport_SmtpAgent $agent, $username, $password);
}
